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The purpose of this study is to investigate the possibility of using low-density polyethylene (LDPE) plastic waste as a bitumen modifier for asphalt concrete-binder course (AC-BC) mixtures. The influence of LDPE obtained by various mixing temperatures and LDPE content on the Marshall properties on road pavement was investigated. LDPE mixing process in this study uses the dry method. It means that LDPE plastic material is directly mixed into aggregate; when the aggregate is heated, then the mixture of aggregate and LDPE is added to hot asphalt. In this research, asphalt with penetration of 60/70 is used. Its optimum asphalt content (OAC) is 5.65%, while LDPE added are 2, 4, and 6% of the asphalt by weight. Each variation of LDPE contents was carried out making 5 specimens. The results showed that the addition of LDPE plastic waste into the AC-BC mixture had a positive effect on Marshall properties on road pavement. The addition of LDPE plastic waste has been able to increase the value of stability and Marshall quotient (MQ). Besides that, the values of Marshall properties such as voids in mix (VIM), voids in mineral aggregates (VMA), voids filled with asphalt (VFA), and flow also still meet Indonesian National Standard (SNI). |
